Research

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  • The Role of Visibility in Pursuit/Evasion Games
    The Role of Visibility in Pursuit/Evasion Games
    The cops-and-robber (CR) game has been used in mobile robotics as a discretized model (played on a graph G) of pursuit/evasion problems. The “classic” CR version is a perfect information game: the cops’ (pursuer’s) location is always known to the robber (evader) and vice versa. Many variants of the classic game can be defined: the robber can be invisible and also the robber can be either adversarial (tries to avoid capture) or drunk (performs a random walk). Furthermore, the cops and robber can reside in either nodes or edges of G. Several of these variants are relevant as models or robotic pursuit/evasion. In this paper, we first define carefully several of the variants mentioned above and related quantities such as the cop number and the capture time. Then we introduce and study the cost of visibility (COV), a quantitative measure of the increase in difficulty (from the cops’ point of view) when the robber is invisible. In addition to our theoretical results, we present algorithms which can be used to compute capture times and COV of graphs which are analytically intractable. Finally, we present the results of applying these algorithms to the numerical computation of COV., Kehagias, A., Mitsche, D., & Pralat, P. (2014). The role of visibility in Pursuit/Evasion games. Robotics, 3(4), 371-399. doi:10.3390/robotics3040371, (This article belongs to the Special Issue Coordination of Robotic Systems)
    The Segmentation of Academic Labour
    The Segmentation of Academic Labour
    published in ACME 4(2): www.acme-journal.org
    The State of Library Makerspaces
    The State of Library Makerspaces
    In this paper, we describe the maker concept, movement and culture and its impact on and relationship with libraries. We provide a comprehensive review of library makerspaces in North America supported by several case studies. We intend this review to be used as a reference resource or tool for libraries planning to implement a new makerspace., Wang, F., Wang, W., Wilson, S., & Ahmed, N. (2016). The state of library makerspaces. International Journal of Librarianship, 1(1), 2-16. https://doi.org/10.23974/ijol.2016.vol1.1.12
    The State of Social Media in Canada 2017
    The State of Social Media in Canada 2017
    Today, billions of people around the world are turning to social media to socialize, conduct business, keep up with the news, as well as discover, discuss, and share information. The significance of this global adoption of a relatively new communication and information technology cannot be overlooked. As a country, Canada has one of the most connected populations in the world. For many Canadians, social media is now a part of their daily routine. Our survey results show that an overwhelming majority of online Canadian adults (94%) have an account on at least one social media platform. This makes it critical for policy makers, researchers, and others to have a better grasp of what social media platforms Canadians are using to connect and converse with one another. This report provides a snapshot of the social media usage trends and patterns amongst online Canadian adults based on an online survey of 1,500 participants (see Methods on p. 16 for more details)., Gruzd, Jacobson, Mai, & Dubois. (2018). The State of Social Media in Canada 2017. Version: 1.0. Ryerson University Social Media Lab. DOI:10.5683/SP/AL8Z6R
    The Story of Vibe Magazine’s TLC Cover: How it Helps to Explain Race, Representation and Resistance from Journalism’s Hip-hop Generation
    The Story of Vibe Magazine’s TLC Cover: How it Helps to Explain Race, Representation and Resistance from Journalism’s Hip-hop Generation
    The International Journal of the Image, Volume 2, Issue 1, pp.57-66. Article: Print (Spiral Bound). Article: Electronic (PDF File; 1.888MB). http://ijx.cgpublisher.com/product/pub.202/prod.91
    The Storytelling External Stakeholder: How Non-Profit Organizations in Supportive Housing Can Help Ensure That Externals Stakeholder Stories End in Connection
    The Storytelling External Stakeholder: How Non-Profit Organizations in Supportive Housing Can Help Ensure That Externals Stakeholder Stories End in Connection
    This paper examines the need for organizations to listen to and learn from the stories of their external stakeholders, especially in the context of supportive housing. To this end, this study builds on research conducted by the Dream Team in 2014, which was compiled to create a bill of rights for supportive housing tenants in the Greater Toronto Area. The literature describes many benefits of storytelling for organizations, but often overlooks the stories of external stakeholders in favour of leadership stories. And yet it is widely understood that it is impossible for one story or storyteller to completely capture the essence of any one organization. Ignoring the stories of external stakeholders creates an atmosphere of disconnection and is tantamount to turning a blind eye to unmet market needs. This paper proposes a framework in which a three-pronged linkage between “stakeholder engagement”, “intersectionality” (Crenshaw, 1991), and “organizational attention” (Gómez, 2015) informs an organization’s understanding of external stakeholders’ “exit” and “voice” behaviours (Hirschman, 1970)—and ultimately helps to ensure that the stories of external stakeholders end in connection. The findings of this study reveal that the subjunctive mood may typically be used to tell stories of disconnection, but more research is needed to determine this. Also, the data suggest that the biggest barrier to communication between tenants and supportive housing organizations may be the myth that people with mental illness and/or substance use issues are incompetent children who must be taken care of.
    The Survival Effect in Memory: Does It Hold into Old Age and Non-Ancestral Scenarios?
    The Survival Effect in Memory: Does It Hold into Old Age and Non-Ancestral Scenarios?
    The survival effect in memory refers to the memory enhancement for materials encoded in reference to a survival scenario compared to those encoded in reference to a control scenario or with other encoding strategies [1]. The current study examined whether this effect is well maintained in old age by testing young (ages 18–29) and older adults (ages 65–87) on the survival effect in memory for words encoded in ancestral and/or non-ancestral modern survival scenarios relative to a non-survival control scenario. A pilot study was conducted to select the best matched comparison scenarios based on potential confounding variables, such as valence and arousal. Experiment 1 assessed the survival effect with a well-matched negative control scenario in both young and older adults. The results showed an age-equivalent survival effect across an ancestral and a non-ancestral modern survival scenario. Experiment 2 replicated the survival effect in both age groups with a positive control scenario. Taken together, the data suggest a robust survival effect that is well preserved in old age across ancestral and non-ancestral survival scenarios., Yang L, Lau KPL, Truong L (2014) The Survival Effect in Memory: Does It Hold into Old Age and Non-Ancestral Scenarios? PLoS ONE 9(5): e95792.
    The Term Structure of Interest Rates in the European Union
    The Term Structure of Interest Rates in the European Union
    Also available for download here: http://ideas.repec.org/p/crt/wpaper/0611.html
    The Term Structures of Interest Rates in the New and Prospective EU Countries
    The Term Structures of Interest Rates in the New and Prospective EU Countries
    Also available for download here: http://ideas.repec.org/p/crt/wpaper/0505.html
    The True Cost of Eating Meat: Direct and Indirect Health Externalities
    The True Cost of Eating Meat: Direct and Indirect Health Externalities
    Background Survivors’ testimonies can reveal much about men’s experiences of prostate cancer and impacts on their quality of life (QOL) during the clinical trajectory of the disease. These survivors’ shared thoughts and views were hypothesized to reflect salient features of their lived social representation of prostate cancer., Zanchetta, M. S., Cognet, M., Lam-Kin-Teng, M. R., Dumitriu, M. E., Renaud, L., & Rhéaume, J. (2016). From early detection to rehabilitation in the community: Reading beyond the blog testimonies of survivors' quality of life and prostate cancer representation. Health and Quality of Life Outcomes, 14(1), 171. doi:10.1186/s12955-016-0568-6